Deadlock is a situation in which two or more processes are unable to proceed because each is waiting for the other to release a resource. Deadlock detection and avoidance techniques are important in operating systems to prevent or resolve these situations.
Deadlock detection involves monitoring a system for potential deadlock scenarios, where processes are blocked due to resource contention. Using techniques like resource-allocation graphs, deadlock detection can be performed efficiently.
For a system with 3 processes and 3 resources:
[[1, 0, 2], [0, 1, 0], [2, 0, 1]][[1, 0, 0], [0, 1, 1], [0, 0, 1]][1, 1, 1]The system is in a safe state. A possible safe sequence is: 1, 0, 2.
Banker's algorithm is a resource allocation and deadlock avoidance algorithm. It ensures that a system remains in a safe state by checking whether granting a process's request for resources will result in a deadlock.
For a system with 4 processes and 3 resources:
[[0, 1, 0], [2, 0, 0], [3, 0, 2], [2, 1, 1]][[7, 5, 3], [3, 2, 2], [9, 0, 2], [4, 3, 3]][3, 3, 2]The system is in a safe state. A possible safe sequence is: 1, 3, 0, 2.
For more information on deadlock detection and Banker's algorithm, you can refer to: